Counting Locally Flat-Foldable Origami Configurations Via 3-Coloring Graphs
Counting Locally Flat-Foldable Origami Configurations Via 3-Coloring Graphs
复制标题
通过三色图计算局部可平折叠折纸配置
DOI:
10.1007/s00373-020-02240-2
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发表时间:
2021
影响因子:
0.7
通讯作者:
Wu, Sylvia
中科院分区:
文献类型:
--
作者:
Chiu, Alvin;Hoganson, William;Hull, Thomas C.;Wu, Sylvia
Origami, where two-dimensional sheets are folded into complex structures, is rich with combinatorial and geometric structure, most of which remains to be fully understood. In this paper we consider flat origami, where the sheet of material is folded into a two-dimensional object, and consider the mountain (convex) and valley (concave) creases that result, called a MV assignment of the crease pattern. An open problem is to count the number locally valid MV assignmentsof a given flat-foldable crease patternC, where locally valid means that each vertex will fold flat underwith no self-intersections of the folded material. In this paper we solve this problem for a large family of crease patterns by creating a planar graphwhose 3-colorings are in one-to-one correspondence with the locally valid MV assignments ofC. This reduces the problem of enumerating locally valid MV assignments to the enumeration of 3-colorings of graphs.
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